/Engine/Source/Runtime/Engine/Public/Physics/ImmediatePhysics/ImmediatePhysicsChaos/ImmediatePhysicsActorHandle_Chaos.h
Set the inverse mass. 0 indicates kinematic object
void SetInverseMass ( [FReal](API\Runtime\Engine\Physics\ImmediatePhysics\ImmediatePhysicsChaos\FReal) NewInverseMass )